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三角形内角和
Author:
谢鹏
GeoGebra
New Resources
三位數除以一位數（二）
畫出對稱圖形
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
Discover Resources
拋物線
Rectangle _03
陳柄何的GGB book
光的反射
雙曲線2--焦點法
Sunrays with different angles
Discover Topics
Secant Line or Secant
Differential Equation
Rhombus
Pie Chart or Circle Chart
Binomial Distribution